Remote push to start
The setting on the K Factor board to enable the remote push to start is GPIO XXX5. When remote push
to start is enabled the dispenser will start a transaction when the input is pulled high for at least 0.5
seconds.
Output
The output setting enables the GPIO board to output pulses. It also sets whether the output pulses are
representing volume(litre/Kg’s) or amount(dollars). Majority of applications will set the pulses to
represent volume
Note you cannot have meter input enabled at the same time.
Frequency
The Frequency output setting sets the maximum speed of the output pulses. The Default setting of 0
sets the frequency to 1KHz. This setting combined with the Value per pulse setting sets the maximum
flow rate of the dispenser.
Example
Frequency set to 1KHz (1000 pulses/sec)
Pulses per value are set to 00001 (10ml/pulse)
That means the maximum flow rate the dispenser can do before the output pulses lag behind is
𝑚𝑎𝑥𝑖𝑚𝑢𝑚 𝑓𝑙𝑜𝑤 = 𝑚𝑎𝑥𝑖𝑢𝑚 𝑓𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 × 𝑝𝑢𝑙𝑠𝑒𝑠 𝑝𝑒𝑟 𝑣𝑎𝑙𝑢𝑒
𝑚𝑎𝑥𝑖𝑚𝑢𝑚 𝑓𝑙𝑜𝑤 = 1000𝐻𝑧 × 10𝑚𝑙
𝑚𝑎𝑥𝑖𝑚𝑢𝑚 𝑓𝑙𝑜𝑤 = 10000 𝑚𝑙 𝑝𝑒𝑟 𝑠𝑒𝑐𝑜𝑛𝑑
𝑚𝑎𝑥𝑖𝑚𝑢𝑚 𝑓𝑙𝑜𝑤 = 600 𝑙 𝑝𝑒𝑟 𝑚𝑖𝑛𝑢𝑡𝑒
The default setting of 1KHz should be sufficient for most applications. In applications where the
maximum flow rate is lower and the 3
rd
party controller is only able to read pulses at a lower
frequency then a lower frequency output can be selected.
Note that if the flow rate exceeds the maximum pulse output the next transaction will not be allowed
until the pulses have completed being outputted.
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